Digital Switching Systems From DNA Group
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Interface Boards - Digital Switching System Markets: Marine applications and other markets.	Keypads - Digital Switching Systems Standard and custom key pads. Markets: Marine applications and other markets.	Electro-Mechanical Digital Switching Systems Power management control. Markets: Marine and transportation markets.	Solid State Digital Switching Systems Power control. Markets: Marine and transportation markets.

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Frequently asked questions about Digital Switching Systems available from DNA Group:

THE DIGITAL SWITCHING SYSTEM (DSS) TECHNOLOGY COSTS MORE THAN DISCRETE SWITCHES. WHY SHOULD A CUSTOMER GO WITH IT?

Although the initial material cost for the DSS exceeds that of discrete switches, customers must take into consideration the total cost of acquisition. Typically, the DSS solution reduces system wiring (and associated installation labor) by approximately 40 percent over discrete switches. Additionally, because the system is completely sealed and impervious to harsh environments, routine maintenance and warranty costs are greatly reduced.

IS IT POSSIBLE FOR THE CUSTOMER TO PROGRAM OR RE-CONFIGURE THE POWER MANAGEMENT ENCLOSURE (PME)?

At this time, all electromechanical and Gen 1.0 solid-state PMEs are configured and programmed at the factory. However, with the introduction of the Gen 1.8 solid state PME, DNA plans to offer its first level of customer programming capability (specifically, the output current trip-point levels). Follow-on revisions of the solid-state PME will offer even more programming capability to DNA's customers.

DOES THE PME OFFER A DIMMING FEATURE?

Through its pulse-width modulation (PWM) technology, DNA is able to offer its customers the dimming function as an option with the electromechanical PME. Additionally, backlights and indicators on the keypad can be pulse-width modulated to increase/decrease brightness. The solid state PME uses power MOSFETs on all output functions, so each output has the capability to be PWM.

WHAT TYPE OF CIRCUIT BREAKERS ARE USED IN THE ELECTROMECHANICAL AND SOLID STATE PMEs?

The circuit breakers used in the electromechanical PME are ETA series 1658. Overcurrent protection in the solid state PME is accomplished by using current-sensing power MOSFETs for each output. The output current sensed by the MOSFET is read in by a microcontroller and compared to the trip current programmed for that circuit. If it is greater than the programmed value, the circuit is shut off and the corresponding LED on the keypad flashes to indicate a circuit fault to the user.

WILL DNA OFFER PRINTED INSERTS FOR THE RELEGENDABLE KEYPAD OR CAN THE CUSTOMER DO THIS THEMSELVES?

We are currently setting up the infrastructure to accommodate both of these scenarios. DNA has the capability to procure printed inserts for customers or simply provide blank inserts for customers to legend themselves.

HOW RELIABLE IS THE DIGITAL SWITCHING SYSTEM TECHNOLOGY?

For more than 5 years the DSS product line has been a major system component to several high-profile customers, including Searay and Correct Craft boats. Most of the historical and documented DSS returns have typically resulted from a component failure external to the DSS. The single largest reason for returned parts is simply that dealers do not completely understand how the system operates. The key to reducing returns of DSS units is to ensure thorough training of service personnel.

Corporate Headquarters
Southeastern Office
DNA Group, Inc.
P.O. Box 31727
Raleigh, NC 27622
Phone: (919) 881-0889
Fax: (919) 881-0144
info@dnagroup.com

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About DNA Group, Inc.: DNA Group is the North American affiliate of Defond (Hong Kong, China). We serve the global marketplace in an unprecedented fashion. We offer our customers a range of electromechanical components, electronic controls and electrical products unmatched in the marketplace. Both companies emphasize and allow versatility, responsiveness and the ability to focus on the needs of each individual customer and project. 

DNA's primary worldwide markets are portable appliances, major appliances, power tools, white goods, lawn and garden, electronics, marine, HVAC, and transportation. Our mission is to deliver a competitive advantage to our Rocker Switch customers with all of the Rocker Switches, Trigger Switches, and electrical component services we produce. 

Today, DNA offers custom electronic controls, humidity controls and portable protection devices, in addition to its expanding range of rocker switches, trigger switches, digital switching units, contactors, digital switching systems, shock protection devices and custom solutions. DNA supports its customers with sales, customer service, engineering, purchasing and administrative staff. It has warehousing locations in Bensensville (Chicago), IL and Laredo, TX. 

Digital Switching Systems is the sales channel of DNA serving the marine and transportation markets. DNA Group, Inc. offers a wide variety of various components and controls for use in marine and transportation applications, including rocker switches, trigger switches, marine power management devices, power management enclosures, marine power management, portable protection devices, shock protection devices, GFCI shock protection devices, ALCI shock protection products, emergency door latch mechanisms, motor controls, lighting applications, and electronic assemblies. 

Visit DNAGroup.com to review our entire line of Digital Switching Systems inventory.

For more than 5 years, the DNA Group digital switching system product line has been a major system component to several high profile customers, including SeaRay and Correct Craft Boats. Although the initial material cost of the digital switching system exceeds that of discreet switches digital switching system customers must take into consideration the total cost of acquisition. Typically, the digital switching solution reduces system wiring (and associated installation labor) by approximately 40% over discreet switches. Additionally, because the digital switching system is completely sealed and impervious to harsh environments, routine maintenance and warranty costs involving digital switching systems are greatly reduced. For more information, view our digital switching systems frequently asked questions brochure.

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